8. Accrued Expenses (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Accrued expenses	$ 1,686,841	$ 1,144,142
Accrued Operating Expenses [Member]
Accrued expenses	854,056	240,941
Accrued Wages and Related Expenses [Member]
Accrued expenses	487,327	490,961
Accrued Interest [Member]
Accrued expenses	0	10,958
Accrued Sales Tax Payable [Member]
Accrued expenses	$ 345,458	$ 401,282